KR101359479B1 - High strength light-weight beam and its molding device and manufacturing method - Google Patents

Abstract

The present invention relates to a molding apparatus for a high strength light weight beam after embossing and a manufacturing method of the same which comprises: a coil (110) provided in a forming work to form an upper wing (11, 21) and a lower wing (17, 27); an inclined plane for reinforcing upper and lower parts (13, 23, 15, 25) which is inclined to the inner tips of the upper wing (11, 21) and the lower wing (17, 27); and A- and B-type beams (10, 20) forming a vertical reinforcing plane (14, 24) which vertically connects the tips of the inclined plane for reinforcing upper and lower parts (13, 23, 15, 25). The A- and B-type beams are used for embossing the inclined plane for reinforcing upper and lower parts (13, 23, 15, 25) and the vertical reinforcing plane (14, 24), within a predetermined space, to form an embossing furring bamboo (18, 28). A spot welding portion (30) is welded to a part where the A- and B-type beams (10, 20) and the embossing furring bamboo (18, 28) meet. The A- and B-type beams (10, 20) are thereby combined in an all-in-one style.

Description

High strength light-weight beam and its molding device and manufacturing method

The present invention relates to a welded connection-type high rigidity light beam after embossing, and a molding apparatus and a manufacturing method thereof, and more particularly, to form a reinforcing slope and a reinforcing vertical surface formed between the upper wing and the lower wing by forming a coil by supplying a coil. After the processed product is processed by A and B type beams through the plastic working method, which is press mold processing, the A and B type beams are welded to each other by butt welding, and in the important position necessary for rigidity in order to improve the rigidity of the combined reinforced lightweight beam. It is automatically supplied from the press line for processing, and it is sequentially applied to presses installed at regular intervals to automatically produce blanking, piercing, plastic processing burring, plastic processing embossing, plastic processing bead, and banding of various shapes in the press line. Precise and precise machining position by transferring the light beam precisely and automatically through the process of feeding and feeding High rigidity light beam and its forming apparatus and manufacturing apparatus that are made by truss structure at regular intervals in the center of the beam when embossed and welded to improve the bending load rigidity and torsional moment rigidity of light beam by plastic processing It is about a method.

The light beam is mainly of the same kind as hard steel, and refers to a rolling agent that is bent to have various cross-sectional shapes, and is mainly used as a light weight in steel frame structures, such as a fixed frame of an inner wall of a building.

Among the light beams, the C-shaped steel has a relatively wide width and an upper surface formed in a planar shape, and

Both side surfaces of the upper surface are bent to protrude to a predetermined width, and bent wings are protruded inward from the lower side of the both side surfaces. Such a seed steel is used for building interiors and structures in combination with the panels joined thereto, mainly used for partitions of walls.

However, the conventional C-shaped steel is weak in durability in the form of a simple "c", and there is a risk of defects, such as being bent inward and outward by the weight and external impact of the panel joined after installation on the building exterior wall.

In addition, the conventional C-shaped steel may not be roll-formed because processing of various shapes such as holes, beads, embossing, and banding to improve the strength thereof may cause a failure in roll forming. Existing C-shaped steel is supplied by a coil to form a C-shaped steel by roll forming, and then cut to a predetermined length (about 10 to 15 meters) to be completed.

On the other hand, the conventional "H" shaped light beam is supplied in each direction so that the coil forms a "H" shape in three directions during the production process by supplying the coil, the flange of the portion where the coils supplied in each direction meet each other The welding machine is installed on both sides so as to be integrated by welding operation, thereby automatically forming.

However, since the conventional "H" type light beams are formed by welding while supplying coils having different thicknesses, the production time is long, and in order to increase the performance against external stiffness. The disadvantages of using high quality materials are high production costs, and thin material thicknesses lead to inferior stiffness, and the use of lightweight beams requires the formation of new holes in order to combine with other components. There is a defect that the strength per thickness is not satisfied, so a light beam that can replace it is needed. However, a light, high rigidity that can cope with bending load stiffness and torsional moment stiffness has not been developed. As yet, no alternatives have been proposed.

Document 1. Patent Registration No. 0555244 (registered Feb. 20, 2006) Document 2. Patent Publication No. 2010-0009025 (published Sep. 15, 2010) Document 3. Utility Model Registration No. 0438580 (registered September 09, 2007) Document 4. Utility Model Publication No. 1999-0037997 (published Jun. 05, 1999)

Therefore, the problem of the present invention, which was devised to solve the above-mentioned drawbacks, is to provide a lightweight, high-stiff, lightweight beam by a plastic working operation using a composite automated mold in an automatic press line by forming a workpiece formed by supplying a coil. Process A, B beams as much as possible; It aims to improve the rigidity by automatically producing A, B type beams to be divided into both sides and piercing, blanking, plastic processing burring, plastic processing embossing, plastic processing beads, welding, and the like.

The present invention is divided into two parts by piercing, blanking, plastic processing embossing, plastic processing corner ribs, plastic processing burring, piercing consisting of a molded part, uneven coupling portion and welding by press mold in the process of forming a light beam. The A and B type beams are integrally formed to form a high rigidity light beam which is light in weight, has a light weight, and greatly improves bending load stiffness and torsional moment stiffness.

The present invention forms the upper wing and the lower wing by forming a coil by forming a coil, and form an upper and lower reinforcement inclined surface to be inclined inwardly to the tip of the upper wing and the lower wing, and vertically the tip of the upper and lower reinforcement inclined surface Consisting of A and B beams forming reinforcing vertical surfaces to connect;
The A and B-type beams, embossing the upper, lower reinforcing slope and the reinforcing vertical surface at regular intervals to form embossing force,
It is characterized in that the A, B-type beams are integrally coupled by welding the spot welds after they are joined to abut on the embossing forces of the A- and B-type beams.

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The present invention is processed to form a light beam of high rigidity and high rigidity by the operation of the composite automatic mold in the automatic press line by supplying the coil to form a beam; A, B type beams to be divided into both sides, blanking, piercing, plastic processing burring, plastic processing embossing, plastic processing beads. It produces automatic welding, and through such processing, the bending load stiffness and torsional moment stiffness per unit area are greatly improved, so that it can be used in various ways as a high rigid and lightweight beam.

The present invention is primary in the process of forming a lightweight beam. Roll forming is used to form plastic processing embossing on corner beads, reinforcing slopes, and reinforcing vertical surfaces while passing the forming beams through the molds of the A and B beams through the press automatic line, thereby improving the rigidity. It is effective to provide high rigidity and light beam by integrally forming A and B beams which are divided into both parts by spot welding and concave-convex joints and welded to the plastic processing embossing force processed on the inclined surface and the reinforcing vertical surface. .

1 is a side view of an A, B type beam in a state of forming the present invention;
2 is a perspective view of the A and B beams in a state of forming the present invention;
Figure 3 is a side view of the embossed state after forming the present invention
Figure 4 is a side cross-sectional view of the embossed state after forming the present invention
Figure 5 is a side view of a state of forming a corner bead after embossing the present invention
Figure 6 is a side cross-sectional view of a state completed by welding after molding the corner bead of the present invention
Figure 7 is an enlarged side cross-sectional view of the main portion in the state completed by welding after forming the corner bead of the present invention
Figure 8 is a cross-sectional side view of the corner bead of the present invention after forming the corner bead is completed by welding
9 is a perspective view of a preferred embodiment of the high rigidity lightweight beam of the present invention.
10 is a front view of the high rigidity lightweight beam of the present invention.
11 is a plan view of a high rigidity lightweight beam of the present invention;
12 is a front view of a high rigidity lightweight beam forming apparatus of the present invention
13 is a plan view of a high rigidity lightweight beam forming apparatus of the present invention
Figure 14 is a block diagram illustrating a preferred embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION The most preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

1 is a side view of A and B beams in a state of forming the present invention, and FIG. 2 is a perspective view of A and B beams in a state of forming the present invention.

The coils are supplied from two lines to form the A and B beams 10 and 20 at the same time by a forming operation or to be formed by dividing into both sides after forming in one line.

The A and B beams 10 and 20 have upper reinforcing inclined surfaces 13 and 23 and lower reinforcing inclined surfaces 15 and 25 inward from the ends of the upper blades 11 and 21 and the lower wings 17 and 27. And the upper reinforcing inclined surfaces 13 and 23 and the lower reinforcing inclined surfaces 15 and 25 are connected to the reinforcing vertical surfaces 14 and 24 in the vertical direction.

The A and B beams 10 and 20 are formed to be symmetrical with each other by forming, and the upper reinforcing inclined surfaces 13 and 23 formed inside the upper blades 11 and 21 and the lower blades 17 and 27. And the lower reinforcing inclined surfaces 15 and 25 are formed to be inclined in an outward direction rather than at right angles.

Figure 3 is a side view of the embossed state after forming the present invention, Figure 4 shows a side cross-sectional view of the embossed state after forming the present invention.

The A and B beams 10 and 20 are embossed by forming corner beads and then supplying them to the next process, including the reinforcing vertical surfaces 14 and 24 and the upper and lower reinforcing slopes 13, 15, 23 and 25. Shavings 18, 28 in longitudinal direction by embossing; It is to be formed continuously at regular intervals.

The embossing forces 18 and 28 protrude to the same height when the A and B type beams 10 and 20 are coupled to each other to be formed to be in contact with each other on a vertical line, and the process of forming the embossing forces 18 and 28. Since the A and B beams 10 and 20 are formed in a symmetrical shape, it is possible to form and supply in one line or two lines.

Figure 5 shows a side view of a state of forming a corner bead after embossing the present invention, the upper wings (11, 21) and the upper wings (11, 21) of the A, B-type beams 10, 20 meet At the corners of the upper reinforcing inclined surfaces 13 and 23, upper corner beads 12 and 22 are formed by plastic working, and the lower reinforcing inclined surfaces which meet the lower wings 17 and 27 and the lower wings 17 and 27 ( At the corners of the bent portions 15 and 25, plastic working lower corner beads 16 and 26 are formed and reinforced.

Figure 6 is a side cross-sectional view of the state completed by welding after forming the corner bead of the present invention, Figure 7 shows an enlarged side cross-sectional view of the main portion of the state completed by welding after forming the corner bead of the present invention.

At least one spot on the embossing forces 18, 28 that abut after forming the upper, lower corner beads 12, 22, 16, 26 or forming the upper, lower corner beads 12, 22, 16, 26; The welds 30 are formed at regular intervals and fixed integrally.

The welding parts 40 and 41 are welded or welded at the portions where the upper blades 11 and 21 and the lower blades 17 and 27 meet after the A and B beams 10 and 20 are integrally formed. Molding is to form the high rigidity lightweight beam 100.

8 is a side cross-sectional view showing a state in which the concave-convex coupling part is completed by welding after forming the corner bead of the present invention, and after forming upper and lower corner beads 12, 22, 16, and 26, an embossing force 18 , 28 to form the concave-convex coupling portion (19, 29) by plastic processing so that the concave-convex shape is combined once more, and to form the concave-convex coupling portion (19, 29) or the concave-convex coupling portion (19, After molding 29), it is fixed to be integral with spot welding, such as spot welding 50, inside the concave-convex coupling portions 19 and 29.

The wells are formed by welding the A and B beams 10 and 20 to be integrally formed with the spot welding part 50, and then welding or welding at the portions where the upper blades 11 and 21 and the lower blades 17 and 27 meet. The high rigidity light beam 100 is formed by molding the ding portions 40 and 41.

9 is a perspective view of a preferred embodiment of the high rigidity light beam of the present invention, FIG. 10 is a front view of the high rigidity light beam of the present invention, and FIG. 11 is a plan view of the high rigidity light beam of the present invention.

The A and B beams 10 and 20, which are symmetrically formed on the upper side and the lower side, and the left side and the right side, form the upper and lower vanes 11, 21, 17, and 27 by forming, and the upper reinforcement slopes 13 and 23. ) And the lower reinforcing slopes 15 and 25 and the reinforcing vertical surfaces 14 and 24.

When the forming operation is completed as described above, by embossing plastic processing at regular intervals on the reinforcement vertical surfaces 14 and 24 and the upper and lower reinforcement inclined surfaces 13, 23, 15 and 25 to form embossing forces 18 and 28. It is.

When the embossing operation is completed as described above, the upper and lower corner beads (12, 22, 16, 26) on the upper and lower blades (11, 21, 17, 27) and the upper and lower reinforcing slopes (13, 23, 15, 25). ) By plastic processing at regular intervals to reinforce rigidity.

When the work of the corner bead as described above, the spot welding portion 30 is welded and fixed to each other by the embossing forces 18 and 28, and after the spot welding portion 30 is welded or the spot welding portion 30 is welded to the upper portion. The high rigidity light beam 100 is formed by forming the welding portions 40 and 41 by welding or welding at the portions where the wings 11 and 21 and the lower wings 17 and 27 meet each other.

12 is a front view of the high rigidity lightweight beam forming apparatus of the present invention, Figure 13 is a plan view of the high rigidity lightweight beam forming apparatus of the present invention.

The coil 110 is supplied to one or two lines, respectively, and the upper blades 11 and 21 are formed in front of the coil 110 to supply the upper blades 11 and 21 and the lower blades 17 and 27. ) And upper reinforcing inclined surfaces 13 and 23 and lower reinforcing inclined surfaces 15 and 25 at the distal ends of the lower blades 17 and 27, respectively, and the upper reinforcing inclined surfaces 13 and 23 and the lower reinforcing inclined surfaces 15 and 25, respectively. The roll forming machine 120 for forming the A and B beams 10 and 20 for forming the reinforcing vertical surfaces 14 and 24, respectively, is formed at the distal end of 25).

The automatic cutting device 130 for cutting the A, B-shaped beam (10, 20) to a predetermined length is installed in front of the roll morming machine (120).

In front of the automatic cutting device 130 is installed a conveyor 140 for supplying the roll-formed A, B-type beams (10, 20).

In front of the conveyor 140, embossing forces 18 to occupy part of the reinforcing vertical surfaces 14 and 24 of the A and B beams 10 and 20 and the upper and lower reinforcing inclined surfaces 13, 23, 15 and 25. , 28) plastic working embossing molding, and on the upper and lower blades (11, 17, 21, 27) and the upper and lower reinforcing slopes (13, 15, 23, 25) of the A, B type beams (10, 20) Presses 150 for forming the upper and lower corner beads 12, 16, 22, and 26 are installed.

In front of the press 150 is installed a conveyor 160 for supplying the A, B type beams (10, 20), respectively.

In front of the conveyor 160 is installed a coupling system 170 for coupling the burring hole 29 of the B-type beam 20 to the piercing hole 19 of the A-type beam (10).

In front of the coupling system 170, the embossing force (18, 28) abuts in the process of supplying the A, B-type beams 10, 20 are coupled to the A, B-type beam 20 to be integrally coupled Install the coupling feeder 180 ,.

A well by welding or welding at a portion where the upper and lower wings 11, 17, 21, 27 meet at the centers of the upper and lower sides of the A and B beams 10 and 20 in front of the coupling supply device 180. The welding apparatus 190 for molding the high rigidity lightweight beam 100 by molding the ding portions 40 and 41 is installed.

The front of the welding device 190 is to discharge the high-strength lightweight beam 100 completed by installing the discharge conveyor 200.

In the present invention having such a configuration, the upper blades 11 and 21 and the lower blades 17 and 27 are respectively formed by forming the coil 110 to the front roll forming machine 120 by forming in a planar state. The upper and lower reinforcing inclined surfaces 13, 23, 15 and 25 are formed at the ends of the upper blades 11 and 21 and the lower wings 17 and 27, and the upper and lower reinforcing inclined surfaces 13 and 23, respectively. The A and B beams 10 and 20 in which the reinforcing vertical surfaces 14 and 15 are formed at the ends of the 15 and 25 are formed.

The A and B type beams 10 and 20 are supplied to the two lines from the forming machine 120 to finish the forming operation, and then are automatically cut to the required length by the automatic cutting device 130 and supplied to the conveyor 140. .

The A and B beams 10 and 20 supplied from the conveyor 140 are supplied to the press 150 and are reinforced with vertical reinforcing surfaces 14 and 24 and the upper and lower reinforcing slopes 13 through plastic working embossing by the press mold. The upper and lower blades 11, 21, 17 and 27 of the A and B beams 10 and 20 after forming the embossing forces 18 and 28 in the longitudinal direction at a predetermined interval. Piercing, blanking, plastic working burring, plastic working embossing, plastic by forming the upper corner beads 12, 22 and the lower corner beads 16, 26 on the upper and lower reinforcing slopes 13, 23, 15, and 25 By forming the processing beads and the like, the rigidity of the A and B beams 10 and 20 is greatly improved.

After a variety of processing through a plurality of press molds in the press 150, the conveyor 160 is supplied to the coupling system 170 by supplying the A, B beams (10, 20).

In the coupling system 170, the A and B beams 10 and 20 are divided and processed in two lines, and then integrated and combined as shown in FIG.

After the A and B type beams 10 and 20 are combined, the embossing forces 18 and 28 are coupled to each other in the coupling supply device 180, and are supplied to the welding device 190 to supply the A and B type beams 10 and 20. In the process of conveying 20, the spot welding portion 30 is welded to the embossing forces 18 and 28 to be fixed integrally, and at the same time or divided, the upper blades 11 and 21 and the lower blades 17 and 27 The high strength lightweight beam 100 is formed through the welds 40 and 41 by welding or welding to the portions except the upper and lower corner beads 12, 22, 16 and 26 where the front ends meet.

The coupling supply device 180 and the welding device 190 are not separately installed, and the welding operation of the spot welding portion 30 and the welding portion 40, 41 of the embossing force ribs 18 and 28 can be simultaneously performed. Do.

After forming the high rigidity lightweight beam 100 as described above is to discharge through the discharge conveyor (200).

The high-strength lightweight beam 100 of the present invention is divided and supplied with coils 110 to each line to form the A, B-shaped beams 10 and 20 by bending, and then reinforce the vertical surface (14.24) In addition, the rigidity is improved by plastic working embossing to form the embossing forces 18 and 28 on a part of the lower reinforcing slopes 13, 23, 15, and 25, and the spot weld 30 at the embossing forces 18 and 28. Both beams are integrally coupled and greatly improve the rigidity through the upper and lower blades (11, 21, 17, 27) and upper and lower reinforcing slopes (13, 23, 15, 25) on the upper and lower corner beads. By forming (12, 22, 16, 26), the rigidity at the wing and the inclined surface is greatly improved, so that the lightweight beam formed by supplying a thin plate to the coil can provide high rigidity.

The present invention is supplied to the press line to form a high-speed supply to the press automatic line after roll forming by supplying the coil automatically controlled by the feed rate is automatically supplied to the press line, blanking, plastic processing bead, plastic processing burring, plastic processing embossing, etc. The mold is machined on the corner bead, reinforcing slope and reinforcing vertical surface by supplying it to the position of the compound automation mold on the press line to automatically produce the mold, and then forming the A and B beams integrally by spot welding, burring and riveting. As a result, a truss structure is formed at regular intervals in the center of the beam, thereby improving bending load stiffness and torsional stiffness of the beam, thereby providing a highly rigid and lightweight beam.

10: A beam 11: upper wing
12, 22: upper corner bead 13, 23: upper reinforcing slope
14, 24: reinforcing vertical surface 15, 25: lower reinforcing slope
16, 26: lower corner bead 17, 27: lower wing
18, 28: embossing force 19A: rivet joint
20: B beam 30, 50: spot weld
40, 41: welding part 100: high rigidity light beam
110: coil 120: roll forming machine
130: automatic cutting device 140, 160: conveyor
150: press 170: coupling system
180: combined supply device 190: welding device
200: discharge conveyor

Claims (7)

By supplying the coil 110 to form the upper blades (11, 21) and the lower blades (17, 27) by the forming operation, inclined inward to the tip of the upper blades (11, 21) and lower blades (17, 27) Upper and lower reinforcing inclined surfaces 13, 23, 15 and 25, and reinforcing vertical surfaces 14 and 24 for vertically connecting the distal ends of the upper and lower reinforcing inclined surfaces 13, 23, 15 and 25. Consisting of A and B beams 10 and 20;
The A and B beams 10 and 20 emboss the upper and lower reinforcement inclined surfaces 13, 23, 15 and 25 and the reinforcement vertical surfaces 14 and 24 at regular intervals to form embossing forces 18 and 28. Forming,
The A and B beams 10 and 20 are coupled to abut on the embossing forces 18 and 28 and then the spot welds 30 are welded so that the A and B beams 10 and 20 are integrally coupled. High rigidity light beam with welded post-embossing connection.
The method of claim 1,
The A and B beams 10 and 20 may have upper blades 11 and 21 and lower blades 17 and 27, and tip portions of the upper and lower blades 11, 21, 17 and 27, and an upper reinforcing inclined surface 13. , 23) and the upper corner bead (12, 22) and the lower corner bead (16, 26) by the press 150 in the corner portion of the lower reinforcing inclined surface (15, 25) welded connection type High rigidity light beam. The method of claim 1,
The A and B beams 10 and 20 are formed by inclining the upper and lower reinforcing slopes 13, 23, 15, and 25 at an end of the upper and lower blades 11, 21, 17, and 27 in an outward direction. Post-embossed welded high rigidity light beam, characterized in that the reinforcing vertical surface (14, 24) is formed to be connected in the vertical direction.
The method of claim 1,
The A and B beams 10 and 20 form an upper welding portion 40 at a portion where the upper wings 11 and 21 meet, and a welding portion 41 at a portion where the lower wings 17 and 27 meet. High rigidity light beam welded connection after embossing, characterized in that formed to be integrally connected to each other by welding.
By supplying the coil 110 to form the upper blades (11, 21) and the lower blades (17, 27) by the forming operation, inclined inward to the tip of the upper blades (11, 21) and lower blades (17, 27) Upper and lower reinforcing inclined surfaces 13, 23, 15 and 25, and reinforcing vertical surfaces 14 and 24 for vertically connecting the distal ends of the upper and lower reinforcing inclined surfaces 13, 23, 15 and 25. A, B type beams 10 and 20;
The upper and lower reinforcing slopes 13, 23, 15, 25 and the reinforcing vertical surfaces 14, 24 are embossed at regular intervals to form embossing forces 18, 28, and at the embossing forces 18, 28 After the butt coupling, the concave-convex coupling portions 19 and 29 are formed to weld the spot welding portion 50 from the concave-convex coupling portions 19 and 29 so that the A and B beams 10 and 20 are integrally coupled. High rigidity light beam of the welded connection after embossing, characterized in that.
By supplying the coil 110 to form the upper blades (11, 21) and the lower blades (17, 27) by the forming operation, inclined inward to the tip of the upper blades (11, 21) and lower blades (17, 27) A having upper and lower reinforcing inclined surfaces 13, 23, 15 and 25, and having reinforcing vertical surfaces 14 and 24 for vertically connecting the distal ends of the upper and lower reinforcing inclined surfaces 13, 23, 15 and 25. A roll forming machine 120 for shaping the B-shaped beams 10 and 20;
An automatic cutting device (130) for cutting the A and B beams (10, 20) to a predetermined length;
In the process of supplying the auto-cut A and B beams 10 and 20 to the conveyor 140, the upper and lower reinforcing slopes 13, 23, 15 and 25 and the reinforcement vertical surfaces 14 and 24 at regular intervals. Embossing to form the embossing force (18, 28), and the upper, lower wings (11, 21, 17, 27) and the upper, lower reinforcing slopes (13, 23,) of the A, B beams (10, 20) Presses 150 for forming upper and lower corner beads 12, 22, 16, and 26 on 15 and 25;
A coupling system (170) for butt coupling at the embossing forces (18, 28) of the A and B beams (10, 20);
The spot welds 30 are welded to the embossing forces 18 and 28 while the A and B beams 10 and 20 are coupled and supplied, and the upper and lower blades 11, 21, 17, and 27 A welding device 190 for forming the high strength lightweight beam 100 by forming the welding parts 40 and 41 by welding in the bent portion;
A discharge conveyor 200 for discharging the high strength lightweight beam 100; Forming apparatus of a high-strength welded connection light beam after embossing, characterized in that consisting of.
By supplying the coil 110 to form the upper blades (11, 21) and the lower blades (17, 27) by the forming operation, inclined inward to the tip of the upper blades (11, 21) and lower blades (17, 27) Upper and lower reinforcing inclined surfaces 13, 23, 15 and 25, and reinforcing vertical surfaces 14 and 24 for vertically connecting the distal ends of the upper and lower reinforcing inclined surfaces 13, 23, 15 and 25. A first step of manufacturing the A and B beams (10, 20);
Embossing the upper and lower reinforcing slopes (13, 23, 15, 25) and the reinforcing vertical surfaces (14, 24) at regular intervals to form embossing force (18, 28);
Upper and lower corner beads 12 and 22 on the upper and lower wings 11, 21, 17 and 27 of the A and B beams 10 and 20, and the upper and lower reinforcing slopes 13, 23, 15 and 25. , 16, 26;
A fourth step of coupling the embossing forces (18, 28) of the A and B beams (20, 28) to butt;
The spot welding portion 30 is welded to the embossing forces 18 and 28 of the A and B beams 10 and 20, and the welding portion is formed at the bent portions of the upper and lower wings 11, 21, 17, and 27. A fifth step of welding 40, 41; Method for producing a welded connection-type high rigidity light beam after embossing, characterized in that the manufacturing through.

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